# Projection (Optics)--Equipment and supplies { "id": "S2025000921", "title": "Projection (Optics)--Equipment and supplies", "url": "/topics/S2025000921", "kind": "topic-directory", "aeo_cohort": "topic-directory", "provider": "lcsh", "revision": "40c09aeb7f9ee587", "catalogue_revision": "f050b5d4780b1289", "numeric_address": "5512489515952129124", "address_version": "morton4x16-v1", "coordinates": [ 0, 482, 52287, 25600 ], "answer_status": "Directory metadata; local answer requires separate source review", "truth_status": "Subject descriptor, not a factual answer or a demonstrated knowledge gap" } Directory metadata is not a factual answer or evidence of a global knowledge gap. Source: https://id.loc.gov/authorities/subjects/sh2025000921 No owner-reviewed local answer yet.